Expanding mandrel



(No Model.)

S. W. TWINING & E. R. COLLINS.

EXPANDING MANDREL.

No. 522,699. Patented July 10, 1894.

Tl/F/RATTORNEY mm. mums! a. c:

UNITED STATES PATENT OFFICE.

SAMUEL W. TWINING AND EDMUND R. COLLINS, OF BROOKLYN, NEW YORK.

EXPANDING MANDREL.

SPECIFICATION forming part of Letters Patent No. 522,699, dated July 10, 1894. Application filed January 19, 1893- Serial No. 453,971. (N0 model.)

To all whom it may concern:

Be it known that we, SAMUEL W. TWINING and EDMUND R. COLLINS, both of Brooklyn, county of Kings, and State of New York, have invented a certain new and useful Improvement in Expanding Mandrels, of which the following is a specification.

This invention relates to mandrels employed in printing presses for supporting a roll of paper and it consists of a mandrel comprising segmental pieces adapted to be expanded within a roll of paper in parallel lines.

In mandrels employing conical portions designed to be forced into the roll the roll is apt to be circumferentially expanded at its ends. We obviate this difliculty by expanding the mandrel parallel with the width of the paper roll.

We will describe a mandrel embodying our improvement and then point out the novel features in claims.

In the accompanying drawings Figure l is a side view of a mandrel embodying our improvement. Fig. 2 isa longitudinal section thereof. Fig. 3 showsaroll of paper mounted on the mandrel. Fig. 4 is an end view of mandrel sections. Fig. 5 is an end view of an expanding ring. Fig. 6 shows a spring collar employed in holding the mandrel sections together.

It is to be understood that Figs. 1 and 2 show only one portion of the mandrel but the two portions are shown in position, partly in dotted line, in Fig. 3.

Referring by letter to the drawings A designates a rotary shaft mounted in bearings a. This shaft may be moved longitudinally when it is desired to adjust a roll of paper A, to printing rolls. The means here shown for moving the shaft longitudinally consists of a screw rod (1., provided with a hand piece atits outer end and having hearings in a standard or and a bracket a extended from the standard. An internally threaded sleeve a engages the screw rod and has a finger (1 extended into an annular groove in a pulley a? fixed on the shaft A. Obviously by rotating the screw rod the shaft may be moved longitudinally in either direction.

Referring to Figs. 1 and 2 B designates a sleeve movably mounted on the shaft A, and held in its adjusted position by means of a set screw 1) extending through a tapped hole in the sleeve and impinging upon the shaft. A ring I) may surround the inner end of the sleeve B and the set screw extended through a hole in this ring. The ring hasan angular exterior so that a wrench or similar tool may be engaged with it to hold the shaft A from rotating during the operationof expanding the mandrel.

O, 0', O designate the segmental sections of the mandrel surrounding the sleeve B at its inner end. The ends of these sections are beveled or inclined inward as at o. The

bevels at one end engage against an annular beveled shouldea c on the sleeve, and the bevels at the opposite end engage against the beveled end of an expanding ring 0 sur rounding and movable longitudinally on the sleeve B.

The segmental sections 0, O, 0 are held in position but allowed to expand evenly by means of a spring ring 0 having its ends lapped. This spring is seated in annular channels 0 in the segmental sections.

To prevent a rotary movement of the segmental sections relatively to the sleeve B we employ keys 0 projected from the shoulder 0 into grooves c in the ends of the segmental sections.

The expanding ring O is prevented from rotary movement relatively to the sleeve B by means of a key 0 extended from the sleeve into a longitudinal groove 0 in the interior of the ring. The ring O is moved longitudinally on the sleeve B by means of nuts D D, engaging a threaded portion of the sleeve as shown in Fig. 2. One of these nuts D'serves as a jam nut. The nuts may be formed to receive a wrench for turning them, or they may be provided with holes (1 to receive a rod of iron for turning them.

As before stated there is a sleeve, a mandrel and its expanding mechanism at each end of the paper roll. In adjusting a paper roll the shaft Ais lifted from its bearings and a mandrel, with its appurtenances, at one end is removed. The roll may now be mounted on the mandrel on the shaft and the other Having described our invention, what we claim is- 1. The combination with a rotary shaft, of

a sleeve, movably mounted thereon, a mandrel mounted on said sleeve and consistingof segmental sections and means movable on said sleeve for forcing said sections outward in parallel lines relatively to the sleeve, the said means co-aoting with a beveled shoulder on the sleeve substantially asspecified.

2. The combination with a rotary shaft, of a sleeve mounted thereon and having the an nular beveled shoulder, the mandrel com prising segmental sections having the beveled ends and the expanding ring movable on said sleeve, substantially as specified.

3. The combination with a rotary shaft, of the sleeve movably mounted thereon and having an annular beveled shoulder, the mandrel comprising segmental sections, a spring ring for holding the sections in position, means for preventing a rotation of the sections relatively to the sleeve, and the expanding ring movable on said sleeve, substantially as specified.

4. The combination with a rotary shaft of the sleeve longitudinally adjustable thereon, a set screw for holding the sleeve as adjusted, the mandrel comprising segmental sections having beveled ends to engage a beveled shoulder on the sleeve, the expanding portion to engage the opposite beveled ends of the mandrel sections and a nut for forcing the expanding ring longitudinally, substantially as specified,

5. The'combination with a rotary shaft, the adjustable sleeve, the mandrel sections and means for expanding saidmandrel sections,

of the ring surrounding the outer end of the sleeve and having anvangular exterior, and the set screw passing through the ring and sleeve and engaging the shaft, substantially as specified.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

SAMUEL W. TWINING.

EDMUND R. COLLINS.

Witnesses:

CLARENCE R. FERGUSON, ANTHONY GREF. 

